Backing for artificial teeth



Jan. 21, 1930. F. H. GRANT BACKING FOR ARTIFICIAL TEETH Filed Feb. 192

51140014 501 jranczs fl. Gm, 6

Patented Jan. 21, 1930 UNITE STATES PATENT OFFICE FRANCIS H. GRANT, OFDETROIT, MICHIGANQASSIGNOR TO GRANT DENTAL MANU- FACTURING COMPANY, OFDETROIT, MICHIGAN, A CORPORATION OF MICHIGAN BACKING FOR ARTIFICIALTEETH Application filed February 7, 1927. Serial No. 166,557.

The invention relates to artificial teeth backings designed particularlyfor use with interchangeable facings and has for some of its objects theprovision as an article of manufacture of a standardized completebacking which with a facing approximates the weight of the naturaltooth; the provision of a complete standardized backing so constructedthat it readily conforms to the dies during forging; and the provisionof identification means for the backing which may be formed during theforging and is so located that the liability of being accidentallydestroyed is avoided and that the external shape of the backing is notaffected. With these as well as other obj eots in view, the inventionresides in the novel features of construction and combinations andarrangements of parts as more fully hereinafter set forth.

In the drawings Figures 1 and 2 are respectively front and rearelevations of a backing embodying my invention;

Figures 3 and 4; are respectively longitudinal and transverse sectionstherethrough with a facing attached.

As shown, 1 is the backing of the artificial tooth, this backing being aforged standard ized complete backing, and 2 is a standardizedinterchangeable facing of the artificial tooth corresponding in type andsize to the backing and engageable therewith to form an artificial toothof the approximate size and within the. limits of the replaced natural 5tooth. The backing is formed from a gold or gold alloy ingot and has anexternal anatomically shaped surface 3, a front face t, which latter ispreferably in a single plane, and a longitudinally extending rib 5extending from the front face. The backing has formed in its front faceand at opposite sides of the rib the recesses or pockets 6 for receivingthe cement used in securing the facing to the backing. These recessesare located in the thicker portion of the backing and the bottoms ofthese recesses are formed with the permanent identification means 7 suchas characters for designating the type and size of the backing. Thesecharacters are preftt erably raised. so that the cement filling the recesses may be more easily removed than if the characters were depressed.The characters are also preferably formed during the forging operationand since they are located in the thicker portion of the backing theywill not affect the contour of the external surface. Furthermore, theidentification means being located at the bottoms of the recesses arenot liable to he accidentally destroyed.

By reason of forming the pockets, additional space is provided forcement used in securing the facing to the backing; the weight of thebacking with the facing attached thereto approximates more nearly theweight of the natural tooth; the backing more readily conforms to thedies during the forging; and space is provided for identification means.Furthermore, since the identification means is formed in the recesses,this identification means may be formed during the forging operation anddoes not afiect or distort the external anatomical shape.

What I claim as my invention is:

1. An article of manufacture comprising a forged standardized backingfor use with a standardized interchangeable facing and constructed toform with the facing an artificial tooth, said backing having integralmeans for attaching the facing thereto and being provided with a recess:in its front face formed during the forging operation and separate fromthe attaching means, said backing also being provided with permanentidentification means within the recess for designating the type and sizeof said backing.

2. An article of manufacture comprising a forged standardized backingfor use with a standardized interchangeable facing and constructed toform with the facing an artificial tooth, said backing having anintegral rib for attaching the facing to said backing and being providedwith a recess in its front face and at one side of said rib, saidbacking also having integral raised identification means at the bottomof the recess.

3. An article of manufacture comprising a forged standardized backingfor use with a standardized interchangeable facing and constructed toform with the facing an artificial tooth, said backing having ananatomically shaped external surface, a front face substantially in asingle plane and an integral rib extending longitudinally from the frontface, said backing also having recesses formed in its front face and atopposite sides of said rib and integral raised identification means atthe bottoms of the recesses for designating the type and size of saidbacking.

4. An article of manufacture comprising a forged standardized backingfor use with a standardized interchangeable facing and constructed toform With the facing an artificial tooth, said backing having integralmeans for attaching the facing to said backing and recessed portions inits front face at opposite sides of said attaching means and alsointegral identification means Within one of the recessed portions, therecessed portions and identification means being formed during theforging of the backing.

In testimony whereof I aflix my signature.

FRANCIS H. GRANT.

